Uma maneira de realizar a operação 9972 - 9 de forma rápida e correta é calculando 1 000 * 994, que é igual a 994 000. A igualdade que justifica esse fato está expressa em: a) (a + b)² = a² + b² + 2ab
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b) a² - b² = (a + b)(a - b)
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c) a² - b² = (a - b)²
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d) (a - b)² = a² - 2ab + b²
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e) a² - b² = 1 000(a + b)

Empty box + box + empty box fill in the box is equal to 30 how

How do you find principle and simple interest

Aball is thrown from a height of 139 feet with an initial downward velocity of 15 ft/s. the ball's height h (in feet) after t seconds is given by the following. h=139-15t-16t^2 how long after the ball is thrown does it hit the ground? round your answer(s) to the nearest hundredth. (if there is more than one answer, use the "or" button.) t =